Wood-calipers.



UNITED STATES PATENT OFFICE.

CHARLES F. OSBURN, OF XENIA, OHIO.

WOOD-CALIPERS.

SPECIFICATION forming part of Letters Patent N 0. 715,851, dated December 16, 1902. Application filed February 4, 1901- Serial No. 45,804. (No model.)

.Vide a new and ready means for adjusting the parts of the device to suit the requirements of the user.

For a more complete description I refer to my drawings hereto attached and made a part of the specification.

In the drawings like numerals refer to corresponding parts.

Figure 1 shows the machine looking down.

upon its top. Fig. 2'shows the back part of the device. Fig. 3 shows a full side View.

The machine is preferably made of iron or any other metal suitable, and. the main frame (shown by I and I) is all cast in one piece and shaped as shown in the drawings, 1 being the main body, and I the circular arm extending from the main body. This circular arm I has toward its end and on its inside an extension or point 7, the use of which will be hereinafter explained. The main body I is cast with a square hole through its entire length, and in this square hole is placed a piece of steel 2, which has cog-notches on its one side and a chisel-point at its lower end, (designated by 6.) It'willbe observed that at the one side of I is. left a space in which a roller 3,havin g spiral tl1reads,isplaced, and this spiral-thread roller is held in place by the bolt 5, which also serves an an axis upon which the roller is revolved by the operator. The spiral threads upon the roller 3 engage the cog-notches of the steel piece 2, and thus by turning the roller it causes the steel piece 2 to be moved up and down in the frame in which it works and is easily adapted to be moved to suit the convenience of the user.

Having described my invention, what I claim is In a device of. the class described, a body or shank having a semicircular arm at one end thereof with an inwardly-extendin g point 7 in line with said body,a slide passing through a channel in said body and having a pointed end 6 in opposition to said point 7, said slide having a toothed edge, a screw 3 journaled in a cut-away portion of said body and engaging said teeth and a set-screw threaded into anopening in the shank and adapted to clamp said slide, substantially as described.

CHARLES F. OSBURN.

In presence of- W. L. MILLER, C. S. HARRIS. 

